Situation 1:
The ‘function not activated’ error occurs when you have not got the xhorse vvdi key tool max ID48 96bit cloning license activated.
Take 10 brand new xhorse remotes and just generate any remote to them. Once you do that it will be activated, it has to be 10 new never used remotes, just generate each 1 1 time, you can generate them over again later when you use them.
Check detail instruction here: How to activate id48 96bit cloning on keytool max?
Situation 2:
I still have this error after generating 10 remotes and got the id48 96bit copy license activated, I don’t see the option under shop>function.
Change network connection and sync device.
Update xhorse key tool max software or firmware and try again.